prodlist_infinite async append bugfix
prodlist_infinite async append bugfix

solves issue when final pipelined request returns before others

sportsworldchicago/app.sportsworldchicago.com---AnyCommerce-Development,CommerceRack/anycommerce,speedaddictcycles/speedaddictcycles,speedaddictcycles/speedaddictcycles,campuscolors/campuscolors,CommerceRack/anycommerce,sportsworldchicago/app.sportsworldchicago.com---AnyCommerce-Development,campuscolors/campuscolors,campuscolors/campuscolors,speedaddictcycles/speedaddictcycles,CommerceRack/anycommerce